diff --git a/v1/vc8.0-tools.jam b/v1/vc8.0-tools.jam
index 0a1f74654..d48bf93ee 100644
--- a/v1/vc8.0-tools.jam
+++ b/v1/vc8.0-tools.jam
@@ -5,9 +5,9 @@ set-as-singleton VC80_ROOT ;
 
 if ! $(MSVCDir)
 {
-    if $(VCINSTALLDIR)
+    if $(VS80COMNTOOLS)
     {
-        VC80_ROOT ?= $(VCINSTALLDIR) ;
+        VC80_ROOT ?= $(VS80COMNTOOLS:J=" ")..\\..\\VC ;
         VC_TOOL_PATH = "$(VC80_ROOT)"\\bin\\ ;
         VC_SETUP = "CALL \"$(VC_TOOL_PATH)VCVARS32.BAT\" >nul" ;
     }
@@ -33,3 +33,4 @@ flags vc8.0 C++FLAGS <native-wchar_t>on : /Zc:wchar_t ;
 
 
 
+